Exercising to make your breasts look bigger can be done at home by focusing on the pectoral muscles that are underneath the fat in a woman's chest. Increase breast size with advice from a personal trainer in this free video about adding muscle to breasts through exercise. Expert: Tanya Batts Bio: Tanya Batts has been a certified personal fitness trainer for more than 11 years. She specializes in Pilates, yoga, combat cardio, aerobics, core conditioning and overall strength training. Filmmaker: Reel Media LLC